From cea0e8e6700e871bb9bcb334cb75fbfbfcdfd702 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Thu, 25 Nov 1999 17:36:48 +0000
Subject: replaced Driver.SetBuffer() with SetDrawBuffer() and SetReadBuffer()

---
 src/mesa/drivers/glide/fxdd.c    | 31 ++++++++++++++++++++++++++++---
 src/mesa/drivers/osmesa/osmesa.c | 15 ++++++++++++---
 2 files changed, 40 insertions(+), 6 deletions(-)

(limited to 'src/mesa/drivers')

diff --git a/src/mesa/drivers/glide/fxdd.c b/src/mesa/drivers/glide/fxdd.c
index cbe63695fa..0668195797 100644
--- a/src/mesa/drivers/glide/fxdd.c
+++ b/src/mesa/drivers/glide/fxdd.c
@@ -242,8 +242,9 @@ static GLbitfield fxDDClear(GLcontext *ctx, GLbitfield mask, GLboolean all,
 }
 
 
-/*  Set the buffer used in double buffering */
-static GLboolean fxDDSetBuffer(GLcontext *ctx, GLenum mode )
+/* Set the buffer used for drawing */
+/* XXX support for separate read/draw buffers hasn't been tested */
+static GLboolean fxDDSetDrawBuffer(GLcontext *ctx, GLenum mode )
 {
   fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
 
@@ -267,6 +268,29 @@ static GLboolean fxDDSetBuffer(GLcontext *ctx, GLenum mode )
 }
 
 
+/* Set the buffer used for reading */
+/* XXX support for separate read/draw buffers hasn't been tested */
+static void fxDDSetReadBuffer(GLcontext *ctx, GLframebuffer *buffer,
+                              GLenum mode )
+{
+  fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
+  (void) buffer;
+
+  if (MESA_VERBOSE&VERBOSE_DRIVER) {
+    fprintf(stderr,"fxmesa: fxDDSetBuffer(%x)\n",mode);
+  }
+
+  if (mode == GL_FRONT_LEFT) {
+    fxMesa->currentFB = GR_BUFFER_FRONTBUFFER;
+    FX_grRenderBuffer(fxMesa->currentFB);
+  }
+  else if (mode == GL_BACK_LEFT) {
+    fxMesa->currentFB = GR_BUFFER_BACKBUFFER;
+    FX_grRenderBuffer(fxMesa->currentFB);
+  }
+}
+
+
 #ifdef XF86DRI
 static GLboolean inClipRects(fxMesaContext fxMesa, int px, int py)
 {
@@ -808,7 +832,8 @@ void fxSetupDDPointers(GLcontext *ctx)
   ctx->Driver.Index=NULL;
   ctx->Driver.Color=fxDDSetColor;
 
-  ctx->Driver.SetBuffer=fxDDSetBuffer;
+  ctx->Driver.SetDrawBuffer=fxDDSetDrawBuffer;
+  ctx->Driver.SetReadBuffer=fxDDSetReadBuffer;
   ctx->Driver.GetBufferSize=fxDDBufferSize;
 
   ctx->Driver.Bitmap=fxDDDrawBitMap;
diff --git a/src/mesa/drivers/osmesa/osmesa.c b/src/mesa/drivers/osmesa/osmesa.c
index a0bb746d00..e5dca91250 100644
--- a/src/mesa/drivers/osmesa/osmesa.c
+++ b/src/mesa/drivers/osmesa/osmesa.c
@@ -1,4 +1,4 @@
-/* $Id: osmesa.c,v 1.3 1999/11/11 01:28:41 brianp Exp $ */
+/* $Id: osmesa.c,v 1.4 1999/11/25 17:37:00 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -541,7 +541,7 @@ GLboolean GLAPIENTRY OSMesaGetDepthBuffer( OSMesaContext c, GLint *width, GLint
 
 
 
-static GLboolean set_buffer( GLcontext *ctx, GLenum mode )
+static GLboolean set_draw_buffer( GLcontext *ctx, GLenum mode )
 {
    (void) ctx;
    if (mode==GL_FRONT_LEFT) {
@@ -553,6 +553,14 @@ static GLboolean set_buffer( GLcontext *ctx, GLenum mode )
 }
 
 
+static void set_read_buffer( GLcontext *ctx, GLframebuffer *buffer, GLenum mode )
+{
+   /* separate read buffer not supported */
+   ASSERT(buffer == ctx->DrawBuffer);
+   ASSERT(mode == GL_FRONT_LEFT);
+}
+
+
 static void clear_index( GLcontext *ctx, GLuint index )
 {
    OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx;
@@ -1539,7 +1547,8 @@ static void osmesa_update_state( GLcontext *ctx )
    ctx->Driver.GetString = get_string;
    ctx->Driver.UpdateState = osmesa_update_state;
 
-   ctx->Driver.SetBuffer = set_buffer;
+   ctx->Driver.SetDrawBuffer = set_draw_buffer;
+   ctx->Driver.SetReadBuffer = set_read_buffer;
    ctx->Driver.Color = set_color;
    ctx->Driver.Index = set_index;
    ctx->Driver.ClearIndex = clear_index;
-- 
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